Lubricating means for sewing-machine-loop takers



Jan. 15, 1929. 1,698,965

r w. N. PARKES LUBRICATING MEANS FOR SEWING MACHINE LQOP TAKERS FiledAug. 11, 1927 INVENTOR William M Parkes WITNESSES Patented Jan. 15,1929.

UNITED STATES PATENT- OFFICE.

WILLIAM NELSON PARKES, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE SINGER 7MANUFACTURING COMPANY, OF ELIZABETH, NEW JERSEY, A CORPORATION OF NEWJERSEY.

LUBRICATING MEANS FOR SEWING-MACHINE-LOOP TAKER-S.

Application filed August 11, 1927.

This invention relates to sewing machine loop-takers employed to castneedle-thread loops around a mass of under-thread contained in abobbin-carrier journaled in the i loop-taker and has for its primaryobject to provide improved means for lubricating the bearing surfacebetween the bobbin-carrier and the loop-taker.

In the present embodiment of the invent-ion, the loop-taker is providedwith a raceway located at the upper rim of the loop-taker body, in whichraceway is journaled the peripheral bearing-rib of a bobbin-carrier. Thewall of the bobbin-carrier above the bearing-rib has an inclinedthread-guiding surface provided with a plurality of oil-wells containinglubricant-conducting wicking. The oil-wells communicate with relativelyconstricted passages leading to the bobbin- 2 carrier bearing rib, someor all of which passages cut through and thereby connect oppo site facesof said bearing-rib. The wicking is preferably extended through thelubricant passages.

In the accompanying drawings, Fig. 1 is a substantially central,vertical section of a loop-taker containing the present improvement.Fig. 2 is a perspective view of the bobbin-carrier. Fig. 3 is a verticalsection through the bobbin-carrier and loop-taker walls, takensubstantially centrally through one of the oil-wells.

The loop-taker shown in the accompanying drawings is of thevertical-axis type for cooperation with a reciprocatory needle 1. Theloop-taker comprises a base or inner body 2 cupped to form a cylindricalside wall 3 terminating at its upper rim in an internal flange 4.Closely embracing the wall 3 is an outer loop-taker body 5 secured uponthe inner body by screws, as 6, said outer body 5 also being provided atits upper rim with an internal flange 7 spaced above the flange 4 andforming therewith a circular raceway 8.

J ournaled in the raceway 8 is a bearing-rib 9 provided at the upperperiphery of a cylindrical bobbin-carrier wall 10 having a centrallyopen base constituted by a narrow in ternal flange 11 at the bottom ofthe wall 10. Sustained upon the flange 11 is a bobbin 12 which may be ofany suitable construction. Projecting upwardly from said base flange 11toward the bearing-rib 9 at the outer side of Serial No. 212,174.

the bobbin-carrier wall is an auxiliary loopspreading hook 13. V

The bearing-rib 9 is interrupted to provide a thread-clearance gap 14,above and adjacent to which gap the bobbin-carrier wall is provided witha notch 15 for the reception of a stationary stop-member (not shown)serving to restrain the bobbin-carrier against rotation with theloop-taker. The bobbin-thread guiding and tensioning devices of thepresent bobbin-carrier are substantially as disclosed in my prior UnitedStates Patent No. 1,484,151, Feb. 19, 1924.

Above the bearing-rib 9 and at the side of said gap 14 therein oppositeto that occupied by the notch 15, the bobbin-carrier wall is providedwith a thread-guiding cast-off 16. Formed in said cast-off 16 are aplurality of oiLwells, as 17, containing lubricant-conducting wicking18. The well-bottoms open into constricted lubricant-conducting passages19 leading to and cutting through the bearingrib 9 to connect theopposite surfaces thereof. The oil-well wicking 18, may, if desired becontinued through the passages 19. Between the passages 19, thebearing-rib 9 is preferably provided with the usual transversethreadclearing slits as 20. The oil-well arrangement of the presentlubricating device therefore provides a substantial lubricant supply forcontinuous operation of the loop-taker, and additionally provides meansfor controlling the flow of the lubricant by reason of the constricted,wicking-filled passages from the oil-wells.

Having thus set forth the nature of the invention, what I claim hereinis:

1. A sewing machine loop-taker provided with a race-way, abobbin-carrier having a peripheral bearing-rib ournaled in said raceway,the wall of said bobbin-carrier adjacent the bearing-rib having anoil-well opening into a relatively constricted lubricant-passage to saidbearing-rib.

2. A sewing machine loop-taker provided with a raceway, a bobbin-carrierhaving a peripheral bearing-rib journaled in said raceway, the wall ofsaid bobbin-carrier above said bearing-rib having a plurality ofoilwells opening into relatively constricted lubricant passages to saidbearing-rib.

3. A sewing machine loop-taker provided with a raceway, a bobbin-carrierhaving a peripheral hearing-rib ournaled in said raceway the wall ofsaid bobbin-carrier above said hearing-rib having a plurality ofoilwells opening into relatively constricted lubricant passages to saidbearing-rib, at least one of said passages connecting the opposite facesof the hearing-rib.

4. A vertical-axis loop-taker for sewing machines, provided at the topwith a raceway, a bobbin-carrier having a peripheral bearing-ribjournaled in said raceway, part of the bobbin-carrier wall above saidraceway being formed with'an inclined, thread-100p guiding surface, saidinclined surface having a plurality of oil-wells opening into relativelyconstricted passages leading to said bearing-rib. V

5. A sewing machine loop-taker provided with a raceway, a bobbin-carrierhaving a peripheral bearing-rib. journal'ed in said raceway, the wallsof'said' bobbin-carrier adjacent said raceway having a plurality ofoil-wells provided with l-ubricant-conducting wicking, said oil-wellsopening into passages leading to said beari-ng rib.

In testimony whereof, I have signed my name to this specification.

' WILLIAM NELSON PARKES.

